Broom-making machine



(No Model.) P. B. DONAHOO.

BR OOM MAKING MACHINE.

No. 521,853. Patented June26; 1894.

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UNITED STATES PATENT ()FFICE.

PETER B. DONAI-IOO, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO GEORGE S. SWITZER, OE SAME PLACE, AND IIUGI'I R. BEAN AND GEORGE E. SIN- CLAIR, OF cIIIoAco, ILLINOIS.

, ,BROOM-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 521,853, dated June 26, 1894.

Application filed January 21 1893. Serial No. 459,264. (No model.)

To all whom it may concern.-

Be it known that I, PETER B. DONAHOO, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Broom-Making Machines, of which the following is a specifi cation, reference being had to the accompanying drawings, in which Figure 1 is a front elevation; and'Fig. 2 is an end elevation.

My invention relates to machines for manufacturing circular brooms, and has for its object to provide a machine which will be 1 adapted for use in manufacturing brooms for use in street sweepers. 5

4 The particular kind of broom which my machine is intended to manufacture consists of a hub, having a spiral groove extending 2o throughout its entire length, in which groove are secured the bristles in bunches arranged at stated intervals. 1

In order to provide suitable sockets to receivethe bunches of bristles the groove is 5 provided with recesses in its opposite sides, arranged to form circular sockets, in which sockets the bristles are secured by placing the center of a bunch of straight bristles over on e of the sockets and then winding a cord in the groove over the center of the bristles, by which arrangement the bristles are forced into the socket and are held in an upright position by the walls of the socket and groove.

It is the object of my invention to provide 3 5 a machine which will be adapted for winding a cord in the groove over the bristles, which object I accomplish v as hereinafter specified and as illustrated in the drawings.

That which I regard as new will be pointed out in the claims.

In the drawings,1, 2 indicate uprights which support the different parts of the machine.

3, 4 indicate rodswhich rise from the ends of the uprights 1, 2, as best shown in Fig. 2, and are screw-threaded upon their upper ends.

5 indicates cross pieces, which are fitted upon the rods 3, 4, and are arranged to move vertically thereupon.

6 indicates nuts adapted to be screwed upon the upper ends of the rods 3, 4.

7 indicates springs, the upper ends of which are mounted upon the rods 3, 4, the upper ends of which springs bear against the nuts 6, their lower ends resting upon the cross bars 5.

8 indicates a drum, which is mounted upon the-uprights 1 and 2 between the rods 3 and 4, and is held in place by the cross bars 5, as

shown in Figs. 1 and 2. The drum Sis adapted to rotate in its bearings.

. 9 indicates a spiral groove which extends throughout the length of the drum 8.

10 indicates a shaft mounted in a bearing 11 carried by the upright 2. The shaft 10 carries a chuck 12, as shown in Fig. 1'.

13 indicates a second chuck mounted upon a suitable shaft journaled in a bearing 14, supported by the upright 1 opposite the bearing 11. The chucks 12 and 13 are adapted to secure and hold between them a brush-hub 15, as best shown in Fig. 1, and they may be of any suitable construction which will adapt them forthat purpose.

16 indicates a pulley,which is mounted upon and keyed to the shaft 10, as shown in Fig. 1.

The rim of the pulley 16 is inclined, as shown.

7 17 indicates a pulley which is loosely mounted upon the shaft 10 adjacent to the pulley 16. The pulley 17 has a projecting rim, the interior surface of which is inclined to adapt it to receive the pulley 16, thereby forming a frictional clutch.

18 indicates a bell crank lever, one of the arms of which is connected to the hub of the pulley 16, the other arm being cpnnected by a connecting rod 19 to a foot lever 20.

The arrangement is such that by depressing the foot lever the pulley 16 will be thrown into engagement with the pulley 17, and when the foot lever is released the pulley 16 will be moved out of engagement with the pulley 17.

The pulley 17 may be driven by any suitable 7 driving mechanism, by which arrangement the shaft 10 maybe throwninto or out of operation, as may be desired.

The hub 15 is provided with a spiral groove 21, adapted to receive the bristles, as above described.

The operation of my improved machine is as follows:-A rope, 22, is Wound upon the drum 8, sufficient rope being used to wind the bristles upon the hub 15. By rotating the shaft 10 the rope will be wound upon the hub 15 in the groove 21, and as the winding progresses the rope will be unwound from the drum 8 and held continuously at the proper angle to enter the groove 21 in the hub 15. The arrangement of the grooves in the hub 15 and drum Sis such that the rope Willbe unwound from the drum at the same rate of speed as it is wound upon the hub. I have found that the best way to accomplish this result is to make the drum and hub of uniform size and to provide them with grooves of equal depth and inclination.

My improved machine is intended primarily for manufacturing brooms of the class described, in which a rope or cord is used for securing the bristles in place, but brooms for other purposes may be manufactured by the use of it, and instead of a rope or cord other suitable material may be used.

That which I claim as my invention, and desire to secure by Letters Patent, is-- l. The combination with devices adapted to rotate a broom-hub of the class described, of a rope-holding drum, said drum having a groove similar to that of the broom hub in point-of diameter and inclination, substantially as described.

2. The combination with uprights l and 2, and rods 3 and 4 carried thereby, of a drum 8 mounted between said rods, cross bars 5, springs 7 adapted to exert a downward pressure upon said cross bars, and mechanism for rotating the hub of a broom, substantially as described.

PETER B. DONAIIOO. 

